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Finding the Fourth Proportional to 456,430.60, 684,645.90 and 426,687.40

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Solution

The fourth proportional to 456,430.60, 684,645.90 and 426,687.40 is: 640,031.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,430.60 : 684,645.90 = 426,687.40 : x
  2. Step 2: Convert to fraction form
    456,430.60/684,645.90 = 426,687.40/x
  3. Step 3: Cross multiply
    456,430.60x = 684,645.90 × 426,687.40
  4. Step 4: Simplify right side
    456,430.60x = 292,129,778,991.66
  5. Step 5: Solve for x
    x = 292,129,778,991.66/456,430.60
  6. Step 6: Final answer
    x = 640,031.10

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.